Research progress on preparation of 3DOM-based oxide catalysts and their catalytic performances for the combustion of diesel soot particles

With increasingly strict environmental regulations and greater awareness of the need for environmental protection, much attention has been given to air pollution caused by diesel soot particles. At present, catalytic after-treatment exhaust technology is one of the most effective ways to eliminate soot particles, and the development of high-efficiency catalysts is the key factor in its wide application. According to the characteristics of gas-solid-solid reactions for catalytic soot combustion, the design and preparation of catalysts with different pore sizes can effectively improve the contact between soot particles and catalysts, greatly improving catalytic activity. In this paper, the preparations of three-dimensional ordered macroporous catalysts, three-dimensional ordered micro/meso-macroporous catalysts, and three-dimensional ordered micro-meso-macroporous catalysts are introduced. The latest research progress on the catalytic performance and mechanism for the combustion of soot particles over 3DOM catalysts is summarized. Finally, the problems and future development trends of three-dimensional ordered macroporous catalysts for soot combustion are proposed.